String.prototype.strip = function()
{
    var str = String(this);
    var whitespace = ' \n\r\t\f\x0b\xa0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000';
    for (var i = 0; i < str.length; i++) {
        if (whitespace.indexOf(str.charAt(i)) === -1) {
            str = str.substring(i);
            break;
        }
    }
    for (i = str.length - 1; i >= 0; i--) {
        if (whitespace.indexOf(str.charAt(i)) === -1) {
            str = str.substring(0, i + 1);
            break;
        }
    }
    return whitespace.indexOf(str.charAt(0)) === -1 ? str : '';
};

String.prototype.join = function(items) {
    var str = "";

    if ($.isArray(items)) {
        for (var i=0; i<items.length; i++) {
            if (str.length > 0) {
                str += String(this);
            }

            str += items[i];
        }
    } else {
        for (var key in items) {
            if (str.length > 0) {
                str += String(this);
            }

            str += key + '=' + items[key];
        }
    }

    return str;
}

String.prototype.startsWith = function(str){
    return (this.indexOf(str) === 0);
}

String.prototype.endsWith = function(str){
    return (this.indexOf(str) === (this.length - str.length));
}

/*

JavaScript Date.format

http://blog.stevenlevithan.com/archives/date-time-format


Mask	Description
d	    Day of the month as digits; no leading zero for single-digit days.
dd	    Day of the month as digits; leading zero for single-digit days.
ddd	    Day of the week as a three-letter abbreviation.
dddd	Day of the week as its full name.
m	    Month as digits; no leading zero for single-digit months.
mm	    Month as digits; leading zero for single-digit months.
mmm	    Month as a three-letter abbreviation.
mmmm	Month as its full name.
yy	    Year as last two digits; leading zero for years less than 10.
yyyy	Year represented by four digits.
h	    Hours; no leading zero for single-digit hours (12-hour clock).
hh	    Hours; leading zero for single-digit hours (12-hour clock).
H	    Hours; no leading zero for single-digit hours (24-hour clock).
HH	    Hours; leading zero for single-digit hours (24-hour clock).
M	    Minutes; no leading zero for single-digit minutes.
        Uppercase M unlike CF timeFormat's m to avoid conflict with months.
MM	    Minutes; leading zero for single-digit minutes.
        Uppercase MM unlike CF timeFormat's mm to avoid conflict with months.
s	    Seconds; no leading zero for single-digit seconds.
ss	    Seconds; leading zero for single-digit seconds.
l or L	Milliseconds. l gives 3 digits. L gives 2 digits.
t	    Lowercase, single-character time marker string: a or p.
        No equivalent in CF.
tt	    Lowercase, two-character time marker string: am or pm.
        No equivalent in CF.
T	    Uppercase, single-character time marker string: A or P.
        Uppercase T unlike CF's t to allow for user-specified casing.
TT	    Uppercase, two-character time marker string: AM or PM.
        Uppercase TT unlike CF's tt to allow for user-specified casing.
Z	    US timezone abbreviation, e.g. EST or MDT. With non-US timezones or in the Opera browser, the GMT/UTC offset is returned, e.g. GMT-0500
        No equivalent in CF.
o	    GMT/UTC timezone offset, e.g. -0500 or +0230.
        No equivalent in CF.
S	    The date's ordinal suffix (st, nd, rd, or th). Works well with d.
        No equivalent in CF.
'…' or "…"	Literal character sequence. Surrounding quotes are removed.
            No equivalent in CF.
UTC:	Must be the first four characters of the mask. Converts the date from local time to UTC/GMT/Zulu time before applying the mask. The "UTC:" prefix is removed.
        No equivalent in CF.


Name	        Mask	                    Example
default	        ddd mmm dd yyyy HH:MM:ss	Sat Jun 09 2007 17:46:21
shortDate	    m/d/yy	                    6/9/07
mediumDate	    mmm d, yyyy	                Jun 9, 2007
longDate	    mmmm d, yyyy	            June 9, 2007
fullDate	    dddd, mmmm d, yyyy	        Saturday, June 9, 2007
shortTime	    h:MM TT	                    5:46 PM
mediumTime	    h:MM:ss TT	                5:46:21 PM
longTime	    h:MM:ss TT Z	            5:46:21 PM EST
isoDate	        yyyy-mm-dd	                2007-06-09
isoTime	        HH:MM:ss	                17:46:21
isoDateTime	    yyyy-mm-dd'T'HH:MM:ss	    2007-06-09T17:46:21
isoUtcDateTime	UTC:yyyy-mm-dd'T'HH:MM:ss'Z' 2007-06-09T22:46:21Z
 */
var dateFormat = function () {
	var	token = /d{1,4}|D{3,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZ]|"[^"]*"|'[^']*'/g,
		timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g,
		timezoneClip = /[^-+\dA-Z]/g,
		pad = function (val, len) {
			val = String(val);
			len = len || 2;
			while (val.length < len) val = "0" + val;
			return val;
		};

	// Regexes and supporting functions are cached through closure
	return function (date, mask, utc) {
		var dF = dateFormat;

		// You can't provide utc if you skip other args (use the "UTC:" mask prefix)
		if (arguments.length == 1 && Object.prototype.toString.call(date) == "[object String]" && !/\d/.test(date)) {
			mask = date;
			date = undefined;
		}

		// Passing date through Date applies Date.parse, if necessary
		date = date ? new Date(date) : new Date;
		if (isNaN(date)) throw SyntaxError("invalid date");

		mask = String(dF.masks[mask] || mask || dF.masks["default"]);

		// Allow setting the utc argument via the mask
		if (mask.slice(0, 4) == "UTC:") {
			mask = mask.slice(4);
			utc = true;
		}

		var	_ = utc ? "getUTC" : "get",
			d = date[_ + "Date"](),
			D = date[_ + "Day"](),
			m = date[_ + "Month"](),
			y = date[_ + "FullYear"](),
			H = date[_ + "Hours"](),
			M = date[_ + "Minutes"](),
			s = date[_ + "Seconds"](),
			L = date[_ + "Milliseconds"](),
			o = utc ? 0 : date.getTimezoneOffset(),
			flags = {
				d:    d,
				dd:   pad(d),
				ddd:  dF.i18n.dayNames[D],
				dddd: dF.i18n.dayNames[D + 7],
                DDD:  dF.i18n.dayNames[D + 14],
                DDDD:  dF.i18n.dayNames[D + 21],
				m:    m + 1,
				mm:   pad(m + 1),
				mmm:  dF.i18n.monthNames[m],
				mmmm: dF.i18n.monthNames[m + 12],
				yy:   String(y).slice(2),
				yyyy: y,
				h:    H % 12 || 12,
				hh:   pad(H % 12 || 12),
				H:    H,
				HH:   pad(H),
				M:    M,
				MM:   pad(M),
				s:    s,
				ss:   pad(s),
				l:    pad(L, 3),
				L:    pad(L > 99 ? Math.round(L / 10) : L),
				t:    H < 12 ? "a"  : "p",
				tt:   H < 12 ? "am" : "pm",
				T:    H < 12 ? "A"  : "P",
				TT:   H < 12 ? "AM" : "PM",
				Z:    utc ? "UTC" : (String(date).match(timezone) || [""]).pop().replace(timezoneClip, ""),
				o:    (o > 0 ? "-" : "+") + pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4),
				S:    ["th", "st", "nd", "rd"][d % 10 > 3 ? 0 : (d % 100 - d % 10 != 10) * d % 10]
			};

		return mask.replace(token, function ($0) {
			return $0 in flags ? flags[$0] : $0.slice(1, $0.length - 1);
		});
	};
}();

// Some common format strings
dateFormat.masks = {
	"default":      "ddd mmm dd yyyy HH:MM:ss",
	shortDate:      "m/d/yy",
	mediumDate:     "mmm d, yyyy",
	longDate:       "mmmm d, yyyy",
	fullDate:       "dddd, mmmm d, yyyy",
	shortTime:      "h:MM TT",
	mediumTime:     "h:MM:ss TT",
	longTime:       "h:MM:ss TT Z",
	isoDate:        "yyyy-mm-dd",
	isoTime:        "HH:MM:ss",
	isoDateTime:    "yyyy-mm-dd'T'HH:MM:ss",
	isoUtcDateTime: "UTC:yyyy-mm-dd'T'HH:MM:ss'Z'"
};

// Internationalization strings
dateFormat.i18n = {
	dayNames: [
		"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",
		"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday",
        "周日", "周一", "周二", "周三", "周四", "周五", "周六",
        "星期天", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"
	],
	monthNames: [
		"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
		"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"
	]
};

// For convenience...
/*
Date.prototype.format = function (mask, utc) {
	return dateFormat(this, mask, utc);
};
*/

var PAGES = {
    home: {
        re: 'http://www\.douban\.com/$',
        items_selector: '.mbtl, .mbtr'
    },
    doulist: {
        re: 'http://(\\w+)\.douban\.com/doulist/(\\d+)/',
        items_selector: 'div.article table, p.ul'
    },
    photos: {
        re: 'http://www\.douban\.com/people/([^/]+)/photos',
        items_selector: 'div.wr div.albumlst, div.wr div.clear'
    },
    album: {
        re: 'http://www\.douban\.com/photos/album/(\\d+)/',
        items_selector: 'div.photolst div.photo_wrap, div.photolst div.clear'
    },
    photo: {
        re: 'http://www\.douban\.com/photos/photo/(\\d+)/',
        autoscroll_selector: 'div.article'
    },
    site_photo: {
        re: 'http://site.douban.com/widget/photos/(\\d+)/photo/(\\d+)/',
        autoscroll_selector: 'div.photitle'
    },
    online: {
        re: 'http://www.douban.com/online/',
        items_selector: 'div.content li.item'
    },
    discussion: {
        re: 'http://www.douban.com/group/(\\w+)/discussion',
        items_selector: 'div.content ul li'
    },
    events: {
        re: 'http://(\\w+)\.douban\.com/events/(.+)/',
        items_selector: 'div.nof.clearfix'
    },
    myevents: {
        re: 'http://www\.douban\.com/location/people/(.+)/',
        items_selector: 'div.nof.clearfix'
    },
    mygroup: {
        re: 'http://www\.douban\.com/group/(.*)',
        items_selector: 'table.olt tr.pl'
    },
    subject: {
        re: 'http://(\\w+)\.douban\.com/subject/(\\d+)/',
        autoscroll_selector: 'h1'
    },

    find: function (url) {
        for (var type in PAGES) {
            if (url.match(new RegExp(PAGES[type].re))) {
                PAGES[type].type = type;

                return PAGES[type];
            }
        }
        return null;
    }
};
